Unformatted text preview: by way of the incurrent siphon and to exit by way of the excurrent siphon. While cilia of gills move water through the mantle cavity, gills also capture particles in water and move them toward the mouth. From the mouth food goes to the stomach, then to the intestine, which passes through the heart and ends at the anus. Bivalves, like other mollusks, have an open circulatory system. Their nervous system consists of three pairs of ganglia. Two excretory kidneys below the heart remove ammonia waste from the pericardial cavity into the mantle cavity, from which it will leave the body. Sexes in class Bivalvia are separate. The gonad is located around the coils of the intestine. Certain clams and annelids have the same type of larva, hinting at a possible evolutionary relationship between the two groups....
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- Fall '10
- Biology, cilia, mantle cavity, BIVALVIA, class bivalvia